Massac County RainfallUnited StatesILMassac County5%Metropolis 5% Chance 10%Brookport 10% Chance 5%Mermet Lake 5% Chance Big BayBoazBrookportCretaceous Hills Nature PreserveFort Massac State ParkHillermanJoppaMassac Forest Nature PreserveMermetMermet LakeMetropolisMetropolis Municipal AirportNew ColumbiaRound KnobSamothShady GroveUnionville